(a) The department may establish one or more escrow accounts in the Texas Department of Motor Vehicles fund for the prepayment of a fee for a permit issued by the department that authorizes the operation of a vehicle and its load or a combination of vehicles and load exceeding size or weight limitations.
(b) The fees and any fees established by the department for the administration of this section shall be administered in accordance with an agreement containing terms and conditions agreeable to the department.

(c) The department shall deposit each fee established under this section to the credit of the Texas Department of Motor Vehicles fund. The fees may be appropriated only to the department for purposes of administering this section.